<template>
  <div>我是Hello中的count{{ count }}</div>
</template>

<script>
export default {
  name: "Hello",
  data() {
    return {
      count: 0,
    };
  },
  mounted() {
    this.$bus.$on('count',(count)=>{
      this.count = count
    })
  },
};
</script>

<style>
</style>